Figure 3. AQP4 labeling of the chick retina. A confocal micrograph of a transverse section of the retina from a form-deprived eye after 72 h of occluder wear is shown. There is strong labeling in the nerve fiber layer (NFL), ganglion cell (GC) layer, and inner plexiform layer (IPL) but very weak labeling in the inner nuclear layer (INL). Note the branching brush-like appearance of the pattern of AQP4 expression and also the appearance of several sublaminae in the IPL, which is similar to the previously described morphology of the Müller cell [51]. Bar is 20 µm.